Impact of Specimen Geometry and Polarized Potential on Cathodic Disbondment Testing for Protective Coatings
Does specimen geometry impact the results of CD testing in a laboratory setting? How does the CD testing parameter "applied potential" translate to actual coating performance under field conditions where "polarized potential" is measured? Are Zn-rich vinyl coatings compatible with cathodic protection?
Need and Benefit
Much of the infrastructure utilized by Reclamation is steel in immersion service. To maintain good performance over time, corrosion protection techniques such as coatings and cathodic protection can be utilized. To ensure that the coatings will be able to withstand the cathodic potentials, a robust cathodic disbondment test procedure is needed.
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